Photobucket has been using the same concept for a couple months now. I ran into a brick wall when I tried using Javascript to access the clipboard. It’s a pretty nice little trick but it instantly made me wonder how much longer we’ll be able to continue using it. FYI it should work in nearly every browser (at least it does on Photobucket).

Works for me in Firefox 1.5. You need to
a) copy the mentioned http://urltea.com/_clipboard.swf to your local webspace
b) create a form input element (whose value will be copied to the clipboard) and pass this element to the function – neither the element id nor the value itself.